and then, there were his feelings to consider. >> it is not that -- i was just -- it was easier than -- easier than divorcing him. you know, i didn't have to worry about the judgment of my family or about breaking his heart, stuff like this, if i get a clean getaway. >> reporter: yeah, breaking his heart, sounds like that would have killed him. unbelievable. next, the war within. how an alarming number of american troops are using a dangerous synthetic drug that is shockingly easy to come by. >> abc news "nightline," brought to you by progressive. hey, buddy? oh, hey, flo. you want to see something cool? snapshot, from progressive. my insurance company told me not to talk to people like you. you always do what they tell you? no... try it, and see what your good driving can save you. you don't even have to switch.